Marin County, California Population 2024

249,730

Marin County, California's estimated 2024 population is 249,730 with a growth rate of -1.24% in the past year according to the most recent United States census data. Marin County, California is the 26th largest county in California. The 2010 population was 252,906 and has seen a growth of -1.26% since that time.

Note: data after 2022 is projected based on recent change

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Year
Population
Growth
Growth Rate
2029234,010-3,144-1.33%
2028237,154-3,144-1.31%
2027240,298-3,144-1.29%
2026243,442-3,144-1.28%
2025246,586-3,144-1.26%
2024249,730-3,144-1.24%
2023252,874-3,144-1.23%
2022256,018-3,144-1.21%
2021259,162-2,120-0.81%
2020261,2822,1970.85%
2019259,085-1,006-0.39%
2018260,0911160.04%
2017259,975-747-0.29%
2016260,722-252-0.1%
2015260,9745710.22%
2014260,4031,9620.76%
2013258,4412,3540.92%
2012256,0877070.28%
2011255,3802,4740.98%
2010252,90600%
1990230,0967,5283.38%
1980222,56816,5308.02%
1970206,03859,21840.33%
1960146,82061,20171.48%
195085,61932,71261.83%
194052,90711,25927.03%
193041,64814,30652.32%
192027,3422,2288.87%
191025,1149,41259.94%
190015,7022,63020.12%
189013,0721,74815.44%
188011,3244,42164.04%
18706,9033,569107.05%
18603,3343,011932.2%
1850323-233,687-99.86%
showing: 35 rows
2024 Growth Rate
-1.24% (-3,144)
County Website
Marin County
County Seat
2020 Population
261,282
Area
520 mi²
Density
480 people/mi²
Growth Since 2020
-4.42% (-11,552)

Marin County, California Population 2024

Population by Race

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Race
Population
Percentage (of total)
White192,20973.79%
Two or more races23,3618.97%
Other race20,7277.96%
Asian16,4036.3%
Black or African American6,2242.39%
Native American1,1310.43%
Native Hawaiian or Pacific Islander4300.17%

White

Two or more races

Other race

Asian

Black or African American

Native American

Native Hawaiian or Pacific Islander

Marin County, California Population by Race

Marin County, California Population Pyramid 2024

Marin County, California Median Age

47.4

Total

46.1

Male

48.7

Female

Marin County, California Adults

There are 209,539 adults, (60,391 of whom are seniors) in Marin County, California.

Marin County, California Age Dependency

74.6

Age Dependency Ratio

40.5

Old Age Dependency Ratio

34.2

Child Dependency Ratio

Marin County, California Sex Ratio

Female132,50250.87%
Male127,98349.13%

Marin County, California Population by Age

Marin County, California Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All103,7092.4564.135.9
Married53,5493.1177.522.5
Non Family37,8661.2749.550.5
Female8,5543.1550.749.3
Male3,7403.2149.550.5

3.02

Average Family Size

2.45

Average Household Size

64.1%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Marin County, California Households and Families

Male

Female

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Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

Marin County, California Educational Attainment by Sex (over 25)

Marin County, California Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

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The highest rate of high school graduation is among white people with a rate of 98.32%.

The highest rate of bachelors degrees is among white people with a rate of 67.97%.

Marin County, California Educational Attainment by Race

All

Male

Female

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$80,036

Average Earnings

$94,541

Average Male

$65,260

Average Female

Marin County, California Earnings by Educational Attainment

Marin County, California Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Marin County, California Language

78.85% of Marin County, California residents speak only English, while 21.15% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 11.17% of the population.

Marin County, California Language

Marin County, California Poverty by Race

rate

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Name
Total
In Poverty
Poverty Rate
White178,5639,3515.24%
Hispanic41,9005,28212.61%
Other20,0713,01015%
Multiple22,9412,0809.07%
Asian15,8881,2938.14%
Black5,27699218.8%
Native1,03417216.63%
Islander407174.18%

6.96%

Overall Poverty Rate

6.68%

Male Poverty Rate

7.23%

Female Poverty Rate

Poverty in Marin County, California

The race most likely to be in poverty in Marin County, California is Black, with 18.8% below the poverty level.

The race least likely to be in poverty in Marin County, California is Islander, with 4.18% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.29%. Among those working part-time, it was 7.77%, and for those that did not work, the poverty rate was 12.88%.

Marin County, California Poverty

rate

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Rate
Poverty
Less Than 9th Grade15.58%
High School11.13%
Some College8.89%
Bachelors or Greater4.28%

Marin County, California Poverty Rate by Education

rate

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Rate
Poverty
Female Unemployed22.71%
Male Unemployed20.41%
Female Employed4.06%
Male Employed2.5%

Marin County, California Poverty Rate by Employment Status and Sex

Marin County, California Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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mean

median

Income by Household Type

Marin County, California Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

51.7%

Overall Marriage Rate

55.5%

Male Marriage Rate

48.2%

Female Marriage Rate

Marin County, California Married by Age and Sex

male

female

Marin County, California Marriage

The age group where males are most likely to be married is 45-54, while the female age group most likely to be married is 35-44.

Marin County, California Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Marin County, California Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

8,624

Number of Veterans

8,089

Male Veterans

535

Female Veterans

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Marin County, California Veterans by War

count

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Marin County, California Veterans by Age

count

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Marin County, California Veterans by Race

Marin County, California Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

4.47%

Veteran Poverty Rate

26.18%

Veteran Disability Rate

Marin County, California Veterans by Education

LaborForceParticipation

63.3%

Labor Force Participation

59.5%

Employment Rate

5.8%

Unemployment Rate

Marin County, California Employment by Age

LaborForceParticipation

Marin County, California Employment by Race

LaborForceParticipation

Marin County, California Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

50.5%

Born in Marin County, California

81.41%

Native Born

18.59%

Foreign Born

8.94%

Non Citizen

9.66%

Naturalized

Place of Birth

81.41% of Marin County, California residents were born in the United States, with 50.5% having been born in California. 8.94% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Marin County, California Place of Birth

Sources